#include "../Eigen/Core"

using namespace Eigen;

int
main()
{
	VectorXf a(10), b(10);
#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
	const DenseBase<VectorXf>& ac(a);
#else
	DenseBase<VectorXf>& ac(a);
#endif
	b.swap(ac);
}
